which ain't so good. used to shake a bit between 20mph to 35mph, but now it starts up whenever I take my hands off the bars, regardless of speed. I took the front wheel off a few weeks ago to check the brake pads, and put it back on just like it was, which is exactly how it should be, which isn't rocket science. Any ideas on what to look for? It is an '85 with about 9K on the odo Maybe I will examing the front tire to see if there are any bubbles on the sidewalls or anything unusual like that, BUT what could it be other than that?